Adjustable trolley block



FIG. 1 is a front view of the adjustable trolley block showing the new design;

FIG. 2 is a right side view of the new design;

FIG. 3 is a top view of the new design;

FIG. 4 is a left side view of the new design;

FIG. 5 is a bottom view of the new design;

FIG. 6 is a rear view of the new design; and,

FIG. 7 is a perspective view of the new design. 

CLAIM The ornamental design for an adjustable trolley block, as shown and described. 